Track-drill.



PATENTED APR. 28, 1908.

D. A. MOORE.

TRAGK DRILL.

APPLIGATIONIILED AUG. 11, 1906.

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PATENTED APR. 2a, 1908.

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. No. 885,944. Q PATENTED APR'. 28, 1908.

' D. A. MOORE.

TRACK DRILL.

APPLICATION FILED AUG.11, 1906.

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Atty? DAVID A. MOORE, OF KALAMAZOO, MICHIGAN.

TRACKDRILL.

Specification of Letters Patent.

Patented April '28, 1908.

Application filed August 11, 1906. Serial No. 330,141.

To all whom it may concern:

Be it known that 1, DAVID A. Moonn, a citizen of the United States,residing at Kalamazoo, county of Kalamazoo, and State of Michigan, haveinvented certain new and useful Improvements ,in Track Drills, of whichthe following is a specification.

This-invention relates to improvements in track drills.

The main objects of this invention are: First, to provide in a trackdrill an improved feed mechanism, whereby the drill holder or stock maybe driven at any desired speed. Second, to provide an improved feedmechanism which may be readily thrown out of operation by the operator.Third, to provide in a track drill an improved rail clutch or clamp.

Further objects, and objects relating to structural details, willdefinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawing forming a part of thisspecification, in which,

Figure l is a central vertical longitudinal section of my improved trackdrill, portions being shown in full lines. Fig. 2 is a plan view withthe upright or standard removed. Fig. 3 is an enlarged detail transversesec tion, taken on a line corresponding to line 33 of Fig. 2, showingdetails of the feed mechanism. Fig. 4 is an enlarged detail taken on aline corresponding to line 44 of Fig. 2, showing further details of thefeed mechanism. Fig. 5 is a perspective view of the feed cam. Fig. 6 isa detail view of a modified form of the feed wheel 24, the peripherybeing A-shaped instead of flat, as shown in the main view of thedrawing. Fig. 7 is a detail of another modification of the feed wheel24.

In the drawing, the sectional views are.

taken looking in the direction of the little arrows at the ends of thesection lines, and similar reference characters refer to similar partsthroughout the several views.

Referring to the drawing, the main frame 1 of my improved track drillpreferably .con-

drill stock or holder, the sprocket wheel being provided with suitablehubs arranged in the bearings 3 see Fig. 1. The crank shaft 7 is mountedon suitable bearings at the upper end of the upright, which preferablyconsists of the members 9 and 10, which members are rigidly bolted tothe horizontalframe 1. The crank shaft 7 is provided with a suitablesprocket wheel which is connected to the sprocket wheel 4 of the toolholder by a chain 6. A crank 8 is provided for the shaft 7.

On the tool holder is a sleeve 11 having a cam projection 12 thereon.This sleeve 11 is splined to the tool holder so that it may be adjustedlongitudinally thereon. The cam projection of the sleeve 11 is inclined,i. 6.,11? projects farther at one end than at the other, the purpose ofwhich will appear later.

The cam sleeve 11 is provided with an annular groove 43, which isengaged by the arm 44 projecting from the sleeve 15, which is arrangedupon the rod 13 arranged parallel with the drill holder. By means of theknurled finger nut 14, which is suitably connected to the sleeve 15, thearm is adjusted back and forth upon the rod carrying the cam with it,changing its position relative to the feed lever 17, the roller 18 ofwhich is engaged by the cam as the tool holder is revolved. The feedlever or arm is carried by the rock shaft 16. As the tool holderrevolves, the cam engages the roller 18 of the feed lever, therebyactuating the same. The rock shaft 16 is arranged parallel with the toolholder. A feed screw is provided for the tool holder preferably bythreading the rear portion thereof. The feed wheel 14 is provided withinternal threads and turns freely upon the feed screw.

On the shaft 16 is a clamping shoe or jaw 22 arranged to engage theperiphery of the feed wheel 24 so that, when the rock shaft is actuated,the feed wheel is locked against rotation thereby. This, of course,causes the revolving tool holder to be fed forward so long as the feedwheel is locked against rotation.

A pivoted jaw or shoe 23 is arranged to coact with the shoe 22, the samebeing arranged on the opposite side of the feed wheel and connected tothe rock shaft by means of an upwardly projecting arm 21 thereon and thelmk 25. The shoe 23 is pivoted at 49. The shaft 16 is supported at itsrear end by the support 48 which is pivoted at 50; see Fig. 4. Thisallows a slight swinging movement of the shoe to and from the feedwheel. A spring 41 is arranged to hold the clam ing jaws or shoes forthe feed wheel out 0 engagementj see Fig. 4. By this arrangement, thefeed can be adjusted to suit the particular requirements by shifting thecam sleeve 11. I also provide further means of adjustment, the feedlever 17 being adjustably secured to the rock shaft. The rock shaft isprovided with a fixed projection 39 to which the lever 17 is adjustablyconnected by means of the bolt 19 arranged therethrough. A winged nut 20is provided for the bolt 19 v and the s ring 40 is arranged between itand the top of the lever. By adjusting the nut, the tension of thespring may be adjusted so that thelever has more or less movement beforeit acts upon the rock shaft, thereby determining the length of time oneach revolution of the tool holder during which the feed wheel islocked.

In the modified construction shown in Fig. 6, the feed wheel 24 isprovided with an A- shaped peripl'iery and the shoe 45 is shaped toconform thereto. This secures a somewhat greater gripping surface. Inthis construction it is intended to use only one shoe. The structureshown in Fig. 4 having two shoes, however, is of advantage as it takesoff the side thrust on the tool holder.

In the modified construction of this (Fig. 6) the shoe 45 is held out ofits engaging position by means of the coiled spring 46, supported by asuitable bolt 47. The modified construction of Fig. 7 is substantiallythe same with the exception of the shape of the periphery of the feedwheel and the jaw.

In order to permit of the drill being rapidly advanced to the work andwithdrawn, I rovide means by which the operator can ook the feed wheelagainst rotation as long as may be desired. This consists of a handlever 37 which is arranged at the top of the upright of the drill so asto be engaged by the operator while grasping the handle 51 at the top ofthe upright; see Fig. 1.'

The lever 37 is connected to the feed lever 17 of the rock shaft. Bylifting up on this finger lever, the rock shaft is actuated, therebyactuating the feed wheel engaging shoes, locking the feed wheel againstrota tion as long as may be desired. This affords means for very rapidlyadvancing the drill to or withdrawing the same from the work.

A thrust is provided for the feed wheel preferably consisting of bearingrings 52 and 53, having ball races intheir meeting faces.

The hub of the feed wheel 24 rests against the bearing ring 53. Thebearing ring 52 is retained in a suitable boxing by means of the ring54, which is threaded into the same behind the ring. The boxing 27 issplit on one side and is drawn together to lock the retaining ring inposition by a bolt 26, arranged through suitable ears thereon. By thismeans the ring 54 may be adjusted to bring the bearing into properposition. The forward movement of the wheel is prevented by means of thearm 42 which projects upwardly from the main base plate or sh'oe 28.

The drill is locked to the rail by means of the rail engaging hooks orclamps 32, which .are pivotally mounted on the cross rod 34 at theforward ends of the said rails of the frame. The hooks are adapted toengage over the rails, as clearly appears in Figs. 1, and 2. These hooksare connected to the main horizontal frame 1 by means of the links 29and 31., which are pivoted to each other and to the drill frame 1 and tothe end of the hook 32 respectively.

The link 29 is preferably in the form of a yoke and is extended into alever 30 by means of which it may be raised or lowered. The links 31 areprovided with stops 55 adapted to engage under the link 29. The linksform a toggle for drawing the hooks against the rail. The hooks 32 areconnected together by cross rods 34 and 35, making in effect a singlehook having two spaced engaging members. This might, of course, bemodified as desired.

When the lever 30 is thrown upwardly to the position indicated in Fig.1, the'toggle formed by the links 29 and 31 is straightened, therebythrowing the hooks downwardly over the rail and drawing them firmlyagainst the same. W hen the lever 30 is thrown downwardly, the toggle isbroken and the hooks thrown upwardly to release them from the rail. i

The downward projection 36 on the hooks engages the head of the rail andcontinued pressure on the foot lever forces the machine back therefrom.The base 28 is shoe-like in cross sections so that it freely slidesthereon. By this means, I am enabled by a single -movement of the lever30 to entirely disengage the device from the track so that it may betaken out of the way of passing trains, if desired, and it furtheraffords a quick means for releasing the drill, as regularly used. Theforward ends of the side rails of the frame are adapted to rest on thetop of the rail when in operative position, thereby supporting the frontend of the frame and preventing injury to the drill when the railengaging hooks are manipulated.

By the means I have illustrated and described, I secure a feed mechanismwhich ferred by me on account of the structural simplicity andconvenience in manipulation. I am aware, however, that it is capable ofvery great variation in structural details without departing from myinvention.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. The combination with the frame of a rail-engaging hook pivoted onsaid frame; a link pivoted to said frame; an operatinglever carriedthereby; a link pivoted to the rear end of said hook and to thefirst-named link; a stop for limiting the rearward movement of saidlinks relative to each other; and a depending projection on said hooksadapted to engage a rail when said lever is thrown forwardly to breakthe toggle, for the purpose specified.

2. The combination with the frame, of a rail-engaging hook pivoted onsaid frame; a link pivoted to said frame; an operating lever carriedthereby; a link pivoted to the rear end of said hook and to thefirst-named link; and a stop for limiting the rearward movement of saidlinks relative to each other, for the purpose specified.

3. The combination with a frame, of a rail-engaging hook pivoted on saidframe; a toggle connection for said hook to said frame; a projection onsaid hook adapted to engage a rail when said toggle is broken, wherebysaid hook is swung upwardly and said frame.

is pushed away from the rail; .and a shoe-like base for said frame, forthe purpose specified.

4. The combination with a frame, of a rail-engaging hook pivoted on saidframe; a toggle connection for said hook to said frame; a projection onsaid hook adapted to engage a rail when said toggle is broken, wherebysaid hook is swung upwardly to free it from the rail, for the purposespecified.

5. The combination with a horizontally arranged frame, having a baseportion at its rear end and a pair of forwardly projecting arm-likemembers at its forward end adapted to rest upon the rail; arail-engaging hook pivoted upon said forwardly projecting members, saidhook having an arm projecting rearwardly of the pivot thereof and atoggle connection from said frame to said rearwardly projecting arm ofsaid hook, whereby when said toggle is straightened, the hook is throwndownwardly andlocked in engagement with the rail and when said toggle isbroken, said hook is disengaged from the rail and thrown upwardly abovesaid arm-like members'of said frame.

6. The combination with a horizontally arranged. frame having a base atits rear end and forwardly projecting arm-like members at its forwardend to rest upon the rail; a railengaging hook pivoted on said arm-likemembrs and connections from said hook to said frame arranged to rocksaid hook on its pivot, whereby when said connections are manipulated toengage the hook, it is thrown downwardly into engagement with the railand when manipulated to disengage the hook, it is thrown upwardly abovesaid rail-engaging members.

7. The combination with a frame, the forward ends of which are adaptedto rest upon the top of a rail; a rail-engaging hook pivoted on saidframe; means for swinging said hook on its pivot to engage or disengagethe same from a rail, and a projection on said hook adapted to engage arail when said hook operating means is actuated to disengage the hookwhereby said frame is pushed away from the rail.

v8. The combination with a frame of a railengaging hook pivoted on saidframe; means for swinging said hook on its pivot to engage or disengagethe same from a rail; and a projection on said hook, adapted to engage arail when said hook-operating means is actuated to disengage the hook,whereby said frame is pushed away from the rail,

9. The combination with a frame, of a toolholder; driving means for saidtool-holder; a feed-screw therefor; a feed-wheel threaded upon saidfeed-screw; a cam splined upon.

said tool-holder; a feed-lever actuated by said cam; means for lockingsaid feed-wheel actuated by said feed-lever; and a handlever foractuating said feed-lever, for the purpose specified.

10. The combination witha frame, of a tool-holder; driving meanstherefor; a feedscrew for said tool-holder; a feed-wheel threaded uponsaid screw; means for automatically locking said feed-wheel againstrotation as said tool-holder is revolved; and a hand-lever for actuatingsaid locking means.

11. The combination with the frame of a tool-holder; driving meanstherefor; a feedscrew for said tool-holder; a feed-wheel threadedthereon; means for locking said feed-Wheel against rotation; and ahandlever for actuating said locking means.

12. The combination with a frame, of a tool-holder; driving means forsaid toolholder; a feed-screw therefor; a feed-wheel threaded upon saidtool-holder; a cam splined upon said tool-holder; a feed-lever actuatedby said cam; means for adjusting said feed-lever whereby variations inthe stroke of said lever are secured; and means for locking saidfeed-wheel, actuated by said feed-lever, for the purpose specified.

' 13. The combination with a frame, of a tool-holder; driving means forsaid toolholder; at feed-screw therefor; a feed-wheel threaded upon saidtool-holder; a locking means for said' feed-wheel; a feed-lever foractuating said locking means; an inclined cam splined upon saidtool-holder; and means for longitudinally adjusting said cam, wherebythe stroke of said feed-lever is varied, for the purpose specified.

14. The combination with a frame of a tool-holder; driving means forsaid tool holder; a feed-screw therefor; a feed-wheel; a rock shaft; ashoe on said rock shaft, arranged to engage said feed-wheel when saidrock-shaft is actuated a shoe arranged oppositely of said shoe on saidrock shaft, adapted to co-act therewith; an arm on said rock- I shaft; alink connecting said arm to said second shoe; a means for actuating saidrock shaft.

15. The combination with a drill spindle,

of driving means therefor; a feed-screw for said spindle, connected torevolve there- With; a feed-nut for said screw; a friction clutcharranged to act upon said feed-nut; and. actuating means for saidclutch, whereby the said feed-nut is locked against rotation and saidfeed-screw is advanced.

16, The combination with a frame, of a tool-holder; driving means forsaid toolholder; a feed-screw therefor; a feed-wheel threaded upon saidfeed-screw a sleeve having an inclined cam thereon, splined upon saidtool-holder, said sleeve having an annular groove therein; a rodarranged parallel with said tool-holder; an arm arranged to engage saidannular groove in said sleeve, adjustably mounted on said rod; a rockshaft; a feed lever. or arm on said rock shaft, arranged to be actedupon by said cam; and locking means for said feed-wheel, actuated bysaid rock shaft, for the purpose specified.

In witness whereof, I have hereunto set my hand and'seal in the presenceof two witnesses.

DAVID A. MOORE.

